Ijnttfd statfs -patfnt



Jaml w, 1926.

R. R. MGHLUAMS Ron GRIP 0R cima? Filed March 50, 1927 gmc/nto@ Patented dan. lil, lil.

4UNITED `STA pits.

TES PATENT FFECEL l non ein? onv CLAMP.

Application led March 30, 1927. Serial 110.179,411.

This invention relates to rod grips or clai'nps ot the typo eniploymly for exainple, j on polish rods7 sucker rods and the lilre in the operations of puniipini` deep wells and installing and pulling sucker rods.

lt" isiinportant in the art relatingto the jniinipinpY of oil wells and in drilling said well s and niaintaining` the jnoduetion thereof that the tools employed be absolutely .re-`

liable in j ieriorniingl the tunctions tor which they are intended. rl"his is esj'iecially the case with tools ot this vcharacter because breakage thereol' inay result in loss oit' litc or7 atleast, in such injury to the wellas to produce waste ot time and labor in repairing the damage.

An object olE this construction that is relialj le when in use so as to avoid the di'lliculties mentioned above. ln tools ot' this character, simplicity oi' construction and operation are ot iinportance for the reason that quickness oi operation is often a primary `consid'erzition. jiccordin ly7 invention :is simplicity ot construction and operation. A-

Other objects and advantages will appear in the subjoined detailed description. u

'lhe aceonipanj-ying drawings 'illustrate the invention:

Figure 1 is a side elevation et a rod 'ip or elainp constructed in accordance wth the provisions oit this invention.

ll ure 2 is an elevation et 'lllijeuu'e l troni the it or let oi' said turni-e.

Figline il is a 'vertical section on the lino iiulieated by 'lw-l, liipjure r2.

llligure fl; is a reduced transverse section ou the line indicated by @-4, Figure 3.

lfigure 5 isa rerjluced transverse section on the line vindicated by 55, Figure El.

`here is provided a body G having` a. vertical bore extending troni top to bottoni thereof. rEhe here comprises a lower comparatively long tapered portion 7, an upper screw threaded portion 8 and an intermediate enlarged portion 9 connecting;` the portions Y, 8.

YlShe tapered portion is reduced downwardly and preferably has its wall consisting oil? alternating;` linished and unfinished surfaces 1.0, 11 respectively.

Adapted to tit in the bore portion 7 are slips 12 which have tapered external faces 13 to vVit the tapered finished faces 1() ot the bore ot the body 6. Each. slip in cross seetion is somewhat less than semi-circular and invention is to'provide a another important `object ofthey is providedwith a straight groove 'le extend ing longitudinalljT thereof. l The grooves 111s. when the slips 12 are in place in the body 6; together torni a bor adapted to accendino# date a rod or cable A as shown in Figure il.. The grooves 14- are somewhat less thanseinicircular so that there will be aclearance lietween the edges ot the slips when the slips are in engagement with the rod` il.;

The upper portions ot the slips 12 have external recesses 15 which terminate upwardly in outwardly projecting shoulders 1G, said shoulders beingl *formed by the under tace ot external flanges 17. The upper end portions ot the slips 12 are aGCOn'nnmlated in a bore 1,8 of an externally threaded luishingr o r nut 19. The external threads 2O ot ksaid bushing engaging theserew threaded bore portion 8. The bore 18 is provided with an inwardly projecting p annular shoulder 21 which is below the shoulders ldand isspaeed 'frein the shoulders 16 when the rod is' in place between the slips 12.

At their lower endsth'e recesses 15 are terinii'iated by outwardly projectingshoulders 22adapted, when the nut 19 is screwed inwardly, to be engaged by the inner end ot said nut so as to torce the slips 12 downwardly and thus wedge said slips into secure lgrippingengapgernent with the rod A. The nut 19 is provided with a wrench `seat '23j ln some instances, the invention'will Abe nninutactured as above described. and in other instances5 the body (i, as illustrated. willY he` provided with ysuitable means *tor emincetingjY said body with a bail or other suspending' device; fr bail ll is indicated in broken lines in Figures 'l and 2. ,ln this instance, the body (i is provided with laterally extending circular' bosses i/l 'lio-r the bail B. rlhe bosses 2l are provided with holes to receive cotter pins indicated in broken linesat C.

The invention operates as rfollows:

Assuming` that the rod A is gripped as shown in Figure S, to release the same, the nut 19 will be turned to screw it upwardly, thus urging` the shoulder 21 against the shoulders 16 so as to pull the slips upwardly and relieve the wedging action, thus loosening them upon the rod.` The grip or clamp may then be slipped oil or inay be slipped to different positions along the rod or entirely oft" of saidk rod, as desired.

To again grip the rod, the nut 1) will he turned to screw it downwardly thus ttor-ing the inner end ot the nut against the shoulders 22 so as to cause a Wedging action upon the slips, thus `forcing said slips securely against the rod A. 1t will be noted that, because of the shoulders 16, 22 projecting outwardly from the slips and the shoulder 21 projecting inwardly from the bushino', the slips can be forced inwardly to as great a degree at their upper ends as at theirl lower ends, so that they will engage the rod or cableA uniformly Yfrom end to end ot' the grooves 14.'

To entirely detach the slips 12, as may be desirable to repair or replace them, the nut 19 will be unscrewed from the body 6 and the slips may then be removed one at a time, since they may be closed together so that the flanges 17 will pass through that portion ot' the bore 18 that lies below the shoulder 21.

Since the operation of tools of this character in connection with the pumping and drilling of deep wells and the operations oi maintaining production ot said wells well understood in the art to which this invention relates, a description of the specific operation ot the invention in connection with oil Wells is unnecessary as the various operations are well understood in that art.

It is to be understood that thescrew threads S, 20 constitute a preferred form of cooperating means on the body and bushing to move the bushing inwardly and outwardly; that the shoulders 16, 21 consti tute a preferred form of cooperating means on the slips and bushing to iorce the slips toward the largerend ot the tapered bore `portion when the bushing is moved outwardly; that the shoulders 22 and the inner end of the bushing constitute a preferred form-otl cooperating means on the slips and luishing to :torce the slips toward the smaller end of the tapered bore portion when the bushing is moved inwardly, and that in these respects the invention is not limited to the particular means illustrated and described herein. l

1. A ro-dA grip or clamp comprising a body provided with a tapered bore portion, eX- ternally tapered slips itting said bore portion and provided with outwardly projecting spaced shoulders, and a bushing screwed into the body and provided with an inwardly projecting shoulder engageable beneath one ol' the lirst mentioned shoulders when the bushing is screwed outwardly, the inner end ot the bushing engageable with the other oit the iirst mentioned shoulders when the bushing screwed inwardly.

A rod grip or clamp comprising a body provided with a lower tapered portion reduced .downwardly and with an upper screw threaded portion and with an intermediate enlarged portion connecting the tapered and threaded portions, slips provided with tapered external faces to lit the tapered bore portion, and slips provided with longitudinal grooves which together 'form a bore adapted to accommodate a rod, the upper portions of the slips provided with eX-k ternal recesses terminated upwardly in shoulders, a bushing having threaded engagement with the .screw threaded bore portion of the body, said shoulders projecting into the bore of the bushing and the bore Vot the bushing pro-vided with a shoulder 

